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		<title>《标准数独：从入门到精通》习题答案</title>
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		<h1>第021到030题</h1>
		<p>题目答案按照顺序从左到右、从上到下排布。</p>
		<div>
			#021<img src="answer/021.png" />
			#022<img src="answer/022.png" /><br />
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			#023<img src="answer/023.png" />
			#024<img src="answer/024.png" /><br />
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			#025<img src="answer/025.png" />
			#026<img src="answer/026.png" /><br />
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			#027<img src="answer/027.png" />
			#028<img src="answer/028.png" /><br />
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		<div>
			#029<img src="answer/029.png" />
			#030<img src="answer/030.png" /><br />
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